User interface for a portion of a computing device display screen



The FIGURE is a front view of user interface for a portion of a computing device display screen showing our new design.

The broken line showing of the computing device display screen and the unshaded areas therein are for the purpose of illustrating unclaimed portions and form no part of the claimed design. 

The ornamental design for a user interface for a portion of a computing device display screen, as shown and described. 